If it is in good shape, I'd go for it. Ball appears to be very durable, I just heard from my pro shop that there had been some cracking issues on finger holes for some customers, but I cannot confirm that from my specimen.
Ball IS an oiler, despite its sheen OOB finish. The high particle load creates traction galore, esp. early on the lane. Needs head oil, ignore carrydown, you have to know when to bag it. When I got mine I was warned by BR.com users not to use a too rolly drilling on it, even for oil use, and they were/are definitively correct.
I'd use the NS2 just for what it was designed for - oil - and probably anything else will fit under it, for less oil and for a longer/flippier reaction.
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DizzyFugu - Reporting from Germany
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